3991034880 has 264 divisors, whose sum is σ = 15805656672. Its totient is φ = 912162816.

The previous prime is 3991034843. The next prime is 3991034899. The reversal of 3991034880 is 884301993.

It is a super-2 number, since 2×3991034880² = 31856718826753228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316374 + ... + 328746.

Almost surely, 2^3991034880 is an apocalyptic number.

3991034880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3991034880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7902828336).

3991034880 is an abundant number, since it is smaller than the sum of its proper divisors (11814621792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3991034880 is a wasteful number, since it uses less digits than its factorization.

3991034880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12411 (or 12390 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 3991034880 is about 63174.6379491011. The cubic root of 3991034880 is about 1586.2142281146.

The spelling of 3991034880 in words is "three billion, nine hundred ninety-one million, thirty-four thousand, eight hundred eighty".